#include <iostream>
using namespace std;
#include <assert.h>
#include <sys/time.h>
#include <unistd.h>

int main(int argc, char *argv[]) {
  if (argc != 2) {
    cout << "输入的参数数量有误" << endl;
    exit(1);
  }

  char *str = argv[1];
  while (1) {
    sleep(1);
    cout << str << endl;
  }
  return 0;
}
